1203121113 has 8 divisors (see below), whose sum is σ = 1613124000. Its totient is φ = 797599488.

The previous prime is 1203121109. The next prime is 1203121121. The reversal of 1203121113 is 3111213021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1203121113 - 2² = 1203121109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203121092 and 1203121101.

It is not an unprimeable number, because it can be changed into a prime (1203125113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119688 + ... + 1120761.

It is an arithmetic number, because the mean of its divisors is an integer number (201640500).

Almost surely, 2^1203121113 is an apocalyptic number.

It is an amenable number.

1203121113 is a deficient number, since it is larger than the sum of its proper divisors (410002887).

1203121113 is a wasteful number, since it uses less digits than its factorization.

1203121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240631.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1203121113 is about 34686.0362826311. The cubic root of 1203121113 is about 1063.5790708891.

Adding to 1203121113 its reverse (3111213021), we get a palindrome (4314334134).

The spelling of 1203121113 in words is "one billion, two hundred three million, one hundred twenty-one thousand, one hundred thirteen".